Anthropic releases FlashProve, an open-source prototype that proves a response came from the exact model weights a provider committed to
Why it matters for security: it is a path to checking that an API provider or reseller is serving the model it claims (not a cheaper or tampered one), which matters for routed or third-party model endpoints. It hides weights but not architecture, and the cost overhead keeps it a prototype for now.
Sources: Anthropic: Progress on provable inference for large language models · GitHub: anthropics/FlashProve